I've written a "package" -- by which I mean a directory with an __init__.py in it -- called ardid:
(master)dbliss@nx3[ardid]> ls
analysis.py ardid.sh __init__.pyc plot_support.py utils.py
analysis.pyc goals.py k_12.png plot_support.pyc utils.pyc
ardid.py goals.pyc plot_ardid.py results/
ardid.pyc __init__.py plot_ardid.pyc tests/
As you can see, the package contains the following modules
analysisardidgoalsplot_ardidplot_supportutilsas well as test modules in the directory tests.
(__init__.py is empty.)
However, when I run nosetests with --cover-package=ardid, the output shows coverage only for a few of ardid's modules (specifically ardid, goals, and utils):
(master)dbliss@nx3[ardid]> nosetests tests -s --cover-package=ardid --with-coverage
...............
Name Stmts Miss Cover Missing
----------------------------------------------
ardid.py 0 0 100%
ardid/ardid.py 108 54 50% 105-254
ardid/goals.py 42 38 10% 52-87, 102-161
ardid/utils.py 437 366 16% 23-26, 30-71, 78, 83-89, 108-110, 113-140, 142-146, 165-166, 168-183, 186-218, 223-285, 288-324, 344, 357-427, 438-441, 443-444, 446-468, 475-480, 483-496, 499, 508-509, 512-513, 516-524, 532, 545-548, 559, 571, 575-576, 581-582, 594-605, 614-615, 618-1018
----------------------------------------------
TOTAL 587 458 22%
----------------------------------------------------------------------
Ran 15 tests in 11.454s
OK
Why is this?
Note that it is not the case that these are the only modules for which I have tests:
(master)dbliss@nx3[ardid]> ls tests/
test_plot_support.py test_plot_support.pyc test_utils.py test_utils.pyc
What is true is that the ardid module imports goals and utils, but does not import the other modules. Is this what's causing nosetests only to detect goals and utils (in addition to ardid)? Why would this be?
I think the answer may have to do with the way I'm importing the package modules in my test modules. Because the ardid module has the same name as the package, I have to import it with
from ardid import ardid
(If I were to call simply
import ardid
the package would be imported.)
The other modules I import with, e.g.,
import utils
nosetests considers part of the package ardid modules that are imported from ardid (from ardid the package, not the module).
Thus, one simple solution is to change the imports in the test modules to
from ardid import X
where X is one of the modules to be tested.
Another solution, which would be more appropriate if this package were intended for use by anyone other than me (and which subsumes my solution), is provided by @jonrsharpe in the comments.